From Longman Dictionary of Contemporary Englishgapgap /ɡæp/ ●●●S2W2 noun [countable]1a spaceSPACE/GAP a space between two objects or two parts of an object, especially because something is missinggap inThe neighbors’ dog got in through a gap in the hedge.a gap in the trafficgap betweenthe gap between the two rows of seats► see thesaurus at hole2differenceDIFFERENT a big difference between two situations, amounts, groups of people etc → gulfgap betweenthe widening gap between the rich and the poor →generation gap3something missingCOMPLETE something missing that stops something else from being good or completegap inThere are huge gaps in my knowledge of history.Frank’s death has left a big gap in my life.fill/plug the gapHe filled the gap left by Hirst’s retirement.4in timeHAPPEN a period of time when nothing is happening, that exists between two other periods of time when something is happeninggap inan awkward gap in the conversationgap betweenThe gaps between his visits got longer and longer. →gap year5in a mountainDNSG a low place between two higher parts of a mountain6 →gap in the marketCOLLOCATIONS – Meaning 2: a big difference between two situations, amounts, groups of people etcADJECTIVES/NOUN + gapa big/large/wide gapThere’s a big gap between the two test scores.a huge/substantial etc gapA huge gap exists between the life styles of the rich and the poor.a narrow gapThere’s only a narrow gap between the two candidates in the polls.a yawning gap (=a very big difference)There’s a yawning gap between the earnings of men and women.a growing/widening gapThere is a widening gap in the academic performance of boys and girls.an unbridgeable gap (=a gap that cannot be closed)He felt that there was an unbridgeable gap between the negotiating positions of the two sides.a trade gap (=the difference between the amount a country imports and exports)Britain’s trade gap almost doubled last month.the gender gap (=the difference between men and women)The gender gap was visible in the way men and women voted during the presidential elections.the generation gap (=the difference in attitudes, tastes etc between older and younger people)Taste in music is a good indicator of the generation gap.an age gap (=a difference in age between two people)Despite the age gap, they became good friends.a cultural gap (=a difference between cultures)There is a cultural gap between Europe and America on this subject.verbsbridge/close/narrow the gap (=reduce the amount or importance of a difference)The book aims to bridge the gap between theory and practice.The policies are designed to close the gap between rich and poor.the gap narrowsPolls show the gap between the two candidates has narrowed.widen the gapTechnology has widened the gap between people with and without computer skills.the gap widensThe gap is widening between the incomes of the rich and the less well-off.a gap existsA cultural gap exists between the older and the younger generations.